since the latest update, phrases don’t add to smart review automatically anymore. To do this in retrospect, i tried “add phrases” in the manager. Here, i’m shown that there is an Error 403. If I don’t have the phrases in my smart review, i’m just going to forget them 
Sorry for the trouble! We had some temporary server issues earlier, so it may have been related to that. But if this is continuing to happen, I would recommend deleting the app and then reinstalling it. It should ask you to log-in again after reinstalling. Let me know if the problem continues after that!